The Cepheid Distance to NGC 5236 (M 83) with the VLT

Details The Cepheid Distance to NGC 5236 (M 83) with the VLT The Cepheid Distance to NGC 5236 (M 83) with the VLT

2003-03-04

arxiv.org/abs/astro-ph/0303101v1

Astrophys.J. 590 (2003) 256-270

Astronomy and Astrophysics

Astrophysics

29 pages, 10 figures (reduced quality), 4 tables, accepted for publication in the Astrophysical Journal. A version with the or

Scientific paper

10.1086/374888

Cepheids have been observed in NGC 5236 (M 83) using the ANTU (UT1) 8.2 meter telescope of the ESO VLT with FORS1. Observations over 34 epochs in V and I have been made between January 2000 and July 2001. Twelve Cepheid candidates have periods between 12 and 55 days. The true distance modulus is adopted to be (m-M)_0 = 28.25 +/- 0.15, which corresponds to a distance of 4.5 +/- 0.3 Mpc. The distance of NGC 5253 has been rediscussed. The mean distance of (m-M)_0 = 28.01 +/- 0.15 (based on SN 1972E) shows the galaxy to be a close neighbor of M 83 (separation = 0.5 +/- 0.4 Mpc), suggesting that the two galaxies may have interacted in the past and thus possibly explaining the amorphous morphology of NGC 5253. M 83 is the principal member of the nearby M 83 group containing also, besides NGC 5253, several dwarf members, for five of which TRGB distances are available (Karachentsev et al. 2002a, A&A, 385, 21). The adopted group distance of (m-M)_0 = 28.28 +/- 0.10 (4.5 +/- 0.2 Mpc) together with its mean recession velocity of v_LG = 249 +/- 42 km/s shows again the extreme quietness of the local (1 Mpc to 10 Mpc) expansion field. M 83 fits onto the local mean Hubble flow line of the velocity-distance relation (with H_0 ~ 60) with no significant deviation, supporting the earlier conclusion that the local velocity expansion field is remarkably cold on a scale of 10 Mpc, contrary to the predictions of the simplest cold dark matter model for large scale structure. The role of a cosmological constant has been invoked as a possible solution in providing a nearly uniform force field everywhere in the presence of a lumpy galaxy distribution. (abridged)

Affiliated with

Also associated with

No associations

Rating

The Cepheid Distance to NGC 5236 (M 83) with the VLT does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Cepheid Distance to NGC 5236 (M 83) with the VLT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Cepheid Distance to NGC 5236 (M 83) with the VLT will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-490859